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Questions  >>  Olympiad-Math  >>  Class 9  >>  Linear Equations
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Q)

Find the value of k, if x=1 , y=1 is a solution of the equation 2x+3y=k


( A ) 3
( B ) 5
( C ) 4
( D ) 2

2 Answers

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A)
put  x=1, y=1 in equation

So,

2x+3y=k

2*1+3*1=k

2+3=k

5=k
 
Comment
A)
X=4,y=19. 19=a(4)+3 19=4a+3 19-3=4a 16=4a 16=4a 16/4=a 4=a Value of a =4
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